Hydraulic telemotor.



P. o. sGHoBN. HYDRAULIC TELEMGTOR.

APPLICATION FILED JULY 30, 17009.

Patented Aug. 9,1910.

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F. C. SGHOBN. HYDRAULIC TELEMOTOR.

APPLICATION FILED JULY ao, 1909.

Patented Aug. 9,?1910.

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FREDERICK C. SCHOEN, 0F NEW N. Y., ASSIGNOR T0 LIDGERWOOD MANUFAC- TUBING- COMPANY, A CORPOBATION OF NEW YORK.

HYDRAULIC 'rELguiuoroRvh i Specification of Letters Patent.

i Patented Aug. a, icio.

Application led July 30, 1909. Serial No. 510,384.

To all 'whom it may concern:

Be it known that I, FREDERICK C. ScHoEN, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn,l county of Kings, and State, of New York, have invented certain new and useful Improvements in Hydraulic Telemotors, of which the following is a specification.

My invention relates to hydraulic telemotors of well-known form wherein the operating valve of a ships steering engine is controlled through its connection with mechanism comprising hydraulic cylinders and pistons operated by the turning of the wheel in the ships pilot house. The operation of such va system is liable Vto be deranged or rendered faulty through leakage of the hydraulic cylinders, and it is 'the purpose of my invention ton provide mechanism of novel form whereby the results of such leakage may be overcome-and the eiicient operation of the y mechanism restored.

For the purpose of illustrating my inveny -known form, but I do not desire therebyto limit my device to such use, Amy invention consisting in the design, arrangement, construction and operation of parts as set forth in and falling within the scope of the claims hereto appended. Inthe drawings herewith like characters of reference denote like parts in all the iigures thereof.

` Figure 1 representsa view` in side elevationl of a portion of the steering apparatus comprising the steering wheel and column and one hydraulic cylinder. Fig. 2 represents a detail end View i`n section of a portion ofthe mechanism shown in Fig. 1. Fig. 3 represents a plan View partially in sect-ion of 'another portion of the steering apparatus comprising the second hydraulicl cylinderf, itsconnection to the engine valve, and my novel equalizin device. Fig. 11 represents a view in side e evaton of the second cylinder and my novel equalizing device..l tFig. 'represents an end view in elevation of a portion' of my novel equalizing device.

l rning to a detail description of the 3, reference numeral 1 indicates the steering .column located in the pilot house of the ship.v The steering wheel 2 is connected through pinions 3 with shaft 4 having at its lower end the bevel pinion 5. Pinion 5 meshes with a bevel pinion 6 mounted in the bearing 7. The pinion 6 is provided with a screw-threaded bore passing through its center lengthwise of the pinion,-and through this bore passes a screw-threaded rod 8 mountedv in bearing 9.v In order that the rod 8 will not turn upon movement of pinion l6, a feather 10 is provided in the bearing 9 entering a groove in the ,rod 8. Connected tothe rod 8 is a' piston rod 11 entering and passing through the cylinder 13, being pro'- videdf with a piston head 12 adapted normally to be positioned centrally of the cylinder, as shown in Fig. 1. At the center of the cylinder in the Walls-thereof are y-provided by-passes 14 and l5 so positioned that when the piston head-12 is in its normal cen- .tral position the fluid contained in the cylinpermitted toflow through. the

der Will be lby-passes from one end of the cylinder to the other. A pipe connection 16 is provided whereby connection may be had with Ldrawings yfin connection with Figs. 1 2 and a tank, not shown, used for filling the cylinf der. From the cylinder 13 pipes 17 and 1 7 extending from opposite ends lead to opposite ends of a second hydraulic cylinder 18, which in turn. is provided with a piston head 19 mounted upon the rod 20 and normally adapted to be positioned centrally o f the cylinder. Through links 21 and 23 and the pivoted bell crank lever 22 the piston rod 20 is connectedwith a sleeve`24 passing through a bearing 25. The interior surface of the sleeve 24 is screw-threaded and a screw-threaded' rod 26 passes into the sleeve 24, A collar 27 is mounted on the rod 26, connection being had between the collar 27l and the operating valve. of the steering engine.J As this engine valve construction/` forms no part ofthis invention, I have not V deemed itynecessary to illustrate the same as any one skilled in the art can understand the application of theinvention without detailed description or illustration thereof.

The rod 26 is extended in shaft 28 provided gear 30 on the drum of the steering engine.-

with pinion 29` adapted to mesh with the It will be understood that the engaging f aces of the gears 29 and 30 are so proportioned that they will always remain in mesh during all positions of the shaft 28 during the operation of the mechanism. i

The' operation ofthe hydraulic telemotor in brief is as follows. Upon the turning of the steering wheel 2 the pinion 6 will be turned and therod 8 will be moved longitudinally in accordance with the direction in which pinion 6 is turned 'thereby moving the piston head 12 longitudinally within the cylinder 13. For example, should the piston head 12 move toward the end of the cylinder connected with pipe A17 the liquidin the cylinder will be forced through pipe 17 into one end of the cylinder 18, thereby forcing the piston head'19 in that 'cylinder 1n the opposite direction from the movement of piston head 12 in cylinder 13. In this instance, the piston head 19 will moveto the left in cylinder 18 and through the connections of rod'20 with sleeve 24 said sleeve 24 will be moved upward through its bearing 25, drawing up rod 26 and, through the connection f of collar 27 with the operating valve of the engine opening said valve toa desired extent. ZUpon the'opening of the valve, the steering engine will be operated and the drum of the steering engine revolved. The revolution of the steering engine drum through connection of its gear 30 with the pinion 29 operates to' revolve the rod 28-26,

the portion 26 thereu on moving out of the sleeve 24 by reason of) its screw-thread connection with the inner surface tlllereof and the collar 27 resumin its normal position. In this manner it wille seen that any turning ofthe wheel in the pilot house results in the operation of the engine Fvalve and the operation of the steering engine to any desired extent. The movement of the sleeve 24 in either direction is limited by the collars 31 and 32, which contact with' bearing 25, suchvlimited positions correspondin to 'the movement of the 4rudder either har to port or hard to starboard.

, The operation-of the steering engine has not been vdescribed in full since such an engine is well-known in the art,- as shown, for example, in Patent No. 486,007 issued November 8, 1892.

It will readily be seen that the position of the piston head 19 in cylinder 18 should, at all times, correspond to the position of piston head 12 in cylinder 13 with the difference, however, that said piston heads move in opposite directions when operated. However,'"through leakage ofthe liquid contained in the cylinders A13 andl 18, it sometimes occurs that the movement of piston head x19 does not always follow upon the movement of the piston `head 12. Since the piston head 12 fis mechanically connected to the steering Wheel, its position in the cylinder 13 can be positively controlled, but, when leakage has occurred,- the position of the piston headV 19 in cylinder 18 cannot be controlled since control of said piston head is had only through the liquid contained in theT` cylinders and their connecting pipes.

On the top, of the steering column 1 is located a pointer 33 the movement of which pointer corresponds with the movement of the. steering wheel and shows the man at the wheel exactly 4the position of the rudder when the hydraulic f system is in perfect working order. Should the system, however, be faulty in its operationlthrough leakage, the position of the pointer 33 upon the'- steerlng column will not correspond with the position of the rudder sincefthe piston head 19 will not have been operated,.or will have operated only -to a limited extent, upon movement of the piston head 12in cylinder 13 and the engine valve will, therefore, not havevbeen operated to bring the rudder to the desired position; `In order that the man at the wheel may be informed of such faulty operation of the telemotor it is customary to have in the pilothouse a\se'parate indicating device directly connected with the rudder which at all times shows the exact positionof the rudder. Through comparison of this separate indicating device with the pointer 33 the man atthe" wheel may readily tell when the rudderis in a position other than that indicated by pointer 33. Having observed such faulty operation of the telemotor and the rudder not being in the ldesired position, it is necessary to correct in the operation of .the/telemotor and bring the rudder to the desired position, and it is the object of myinvention, as has been stated, to providea novel means whereby the man at the wheel may achieve this purpose.

Turning to Figs. 4 and 5, it will be seen thatJ the piston rod 20, at its end'opposite to that of its connection with link 21, is connected with a 'rack 34 movable lengthwise in the bearing in the stand 35. Mounted in bearings in the stand 35 is a shaft 36 the fault provided withl a gear pinion 37 meshing l iep 40 passes is of such size that the lrod 40 may i' be lowered without disturbing the weights 41 which rest upon a' shelf 42, butshould the rod 40 be raised, a plate 43 at the bottom of the rod will engage with the weights 41 and the weights will be raised with the rod, being guided in -their movement upward by the guides 44. The weights 41` and f the chain 39 and rods 40 are so arranged that when the piston head 19 is centrally posi-- from the shelf 42 toa degree corresponding with the movement of the'p ston head 19.v

If the telemotor is inperfect: peratin'g condition-in other words, if the cylinders and their connecting pipes are completely filled with liquid, generallywater, and there has' been no leaka e'-the Weight of the elevated weights 41 `w11l not have any powerto r'eturn the piston head 19 to its central position in the cylinder against the action of the liquid contained in the cylinder, but, on

`the other hand, should leakage have ocycurred, the cylinders and their connecting pipes will not-be filled totheir full extent with liquid and the wei hts 41,`which have been elevated, will then ave power to move .the/pistonA head 19 back to its central position in the cylinder 18, at which time the weights -will again'come to rest on the shelfl 42.- This operation takes place in the following manner. Upon the man at the wheel observing that theY real 'position of' the ruddendoes not correspond with lthe position of the pointer 33, h e operates thewheel 2 to 'bring the pointer 33 toa position lcorre- I y sponding with the dead center position'. of

t/erulddei". By so doing, the piston head 12 ismoved to a central positionin 'the cylinder 13 and the water '1n such cylinder is free to-move from one' end to the other around the piston head. Thereupon, there -being a freeci'rculation of the waiter in cylinder-13, the set of' weights 41, which have been elevated,will fall, by reason of gravity, revolving the sprocket wheel 38 and moving the rack 34longitudinally, 'there resulting through conction of the rack with the ro 20, a movement of the piston head 19 yback to a Icentral position in the cylinder 18.. Such a movement of the piston head 19 to its normal central position results in the operationof the engine valve to bring the rudder a central position and the system' is thus restored to perfect `working order, the 4rudder being dead center corresponding to `the pointer 33, and each ofthe piston heads being centrally positioned in their cylinders. The liquid which has been lost by leakage is restored through theinlet 16' from the supply tank, and operation of the steering apparatus may be resumed. This restoring of the system to perfect working order occupies but a brief 'space of time.-

From the foregoing description it-will beseen that I'have 4provided a device -simple in -fault or error in the operation of a hymally positioned centrally of theI cylinder,y

construction, and operation, whereby any .65 draulic telemotor may be'readily corrected and the telemotor'restored to its full eiiiciency without loss of time or labor.

Having thus described my'invention, what I claim and desire to secure by Letters Patent of the United States is 1. The combination' with a telemotor comprising a cylinder,.apiston andapiston head therein, said piston head being normally positioned centrally of the cylinder, and means for operating the piston and piston head, of means adaptedto return the piston head to its central position after the operation thereof, said last-mentioned means comprising a weight adapted to be elevated upon the operation of the, piston head.

2. The combination with a telemotor corn-- prising a cylinder, a piston and a piston head. therein, said piston head being norand means for operating the piston andpiston head, of means adapted to return the piston head toits central position after the operation thereof, said last-mentioned means comprising a plurality of Weights one of 490 which is adapted to be elevated upon the operation of the piston head.

v3. lThe combination with a-telemotor comprising a cylinder, a piston and a piston head therein, said piston head bein .normally positioned centrally of the cy inder, and means' for operating the piston and piston head, of means adapted to return the piston head to its lcentral position after theoperation thereof, said last-mentioned`means comprising a sprocket wheel, a chain passing over said wheel, and a weight attached to the chain, said Wheel being adapted to operate to elevate the weight upon the operation of the piston head.

4. The combination with 4a telemotor comprising a cylinder, a piston and a piston -head therein, said piston head being northe weight upon the operation of the pinion.

In testimony whereof I` have hereunto signed my'name in the presence of two sub-' 120 scribingl witnesses.

y FREDERICK o. SCHOEN.

i Witnesses: 'i

M.' E. MCNINCH, T. EL HARDENBEnGH,.Jr. 

